Hello, i am new to your forum so thanks for taking the time to read this. I have a 67 convertible and the passenger rear window crank does not slide the window up without me lifting the back end of the window throughout the process. I took off the interior skin and the crank assembly is behind the body frame. It looks like I can remove some bolts to get to the assembly but I was wondering if any of you had a similar experience with this. Couldn't be off track so should I consider buying a new one